11998739 has 2 divisors, whose sum is σ = 11998740. Its totient is φ = 11998738.

The previous prime is 11998733. The next prime is 11998741. The reversal of 11998739 is 93789911.

It is a happy number.

11998739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11998739 is a prime.

Together with 11998741, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11998693 and 11998702.

It is not a weakly prime, because it can be changed into another prime (11998733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5999369 + 5999370.

It is an arithmetic number, because the mean of its divisors is an integer number (5999370).

Almost surely, 2^11998739 is an apocalyptic number.

11998739 is a deficient number, since it is larger than the sum of its proper divisors (1).

11998739 is an equidigital number, since it uses as much as digits as its factorization.

11998739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 47.

The square root of 11998739 is about 3463.9196006836. The cubic root of 11998739 is about 228.9348288705.

The spelling of 11998739 in words is "eleven million, nine hundred ninety-eight thousand, seven hundred thirty-nine".